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TAXATION - Movement of valuation allowance (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Movement of valuation allowances |  |  |
Balance at beginning of year | ¥ 892 | ¥ 589 | ¥ 482
Changes in current year | 621 | 303 | 107
Balance at end of year | 1,513 | 892 | ¥ 589
Net operating tax loss carry forwards | 8,200 |  |
Unrecognized tax benefit and accrual | ¥ 0 | ¥ 0 |

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- Definition The amount of unrecognized tax benefits and accrual. + References No definition available. + Details
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- Definition Represents the amount of addition in the period in the valuation allowance for a specified deferred tax asset. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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